Composite pile



Ma/31, 1932. MMUPSON 1,860,792

COMPOSITE PILE Filed Aug. 14, 192e BY ATTORNEYS INVENTOR wf/g@ d@ v ,Patented May 31,' 193.2

l Meiwntnivr. Ursem', or' nifsfnnwoon, new annessa', AssisNoB. `:ro .nAYivroNncoNe cams `sinnc,cui/risalta@ or New Yoann. Y., A conronnmron or NEWJERsEr 'Application 'meerV Augustin This invention i'iertains to" composite-.piles formed by iirst driving a wood or precastcon- Vcrete pile to constituterthe lower portion i t `and then forming thereon'a cast-insplace oo n# portion to complete thev pile crete upper structure. Y In building piles as abovev great diiiiculty has always Vbeeen encountered in preventing the'up'per or cast-in-place. section from lifting olf the lower section after kthe pile is finished,

`due to the heaving .action of the ground, caused largelyby theV driving of adjacent piles. v To overcome this diiliculty, various 'ari lrangements of'so'ckets and reinforcing bars have been-used to lock the upper and lower .-sectionsto'gether. f f j I proposenow to obviate the necessityfor` such's'pecialrlocking devices, by f using the pile shell itself to lock the upper and lower sections together. f In its preferred form the A mediate sleeve so that, when the upper section is cast, the two sections will be so irmly locked together by the shell as to preventv their subsequent separation due to heaving` of the ground. Y Y

. This application is in part acontinuation of mycopending application Serial No. 5,436, led January 29, 1925.` i

' Further and other objects and advantages will be hereinafter set .forth in the accompanying specification and claims, and shown in the drawings, which by way of illustration show whatis now considered to be the preferred embodiment of the invention.

Fig. lshows an arrangement in which a comparatively short lcorrugated sleeve is screwed onto the Lipper end of a'wood pile,

with the lower end of the'upper shell screwed into the sleeve. Y This figure also shows details of the collapsible core used in driving the'pile after the shell is in place. v

Fig. 2-is `a sectional elevation (with the upper and lowerr endsjof the coiii'posite 'pile-` broken' away) offoneforin of composite pile. l V

embodying features of my invention* Figs. 3, 4 and 5 are Afragmentary detail .shell has a 'portioiidirectly threaded onto theVIV 'upper end of a precast. concrete lower section.

-Afterthe lewerA section Vof the composite A `pile-has,been.driven, a pile shell and suitable f driving core are assembled on',` top thereof.

The core may ,be of Veither the collapsible'or` miv non--collapsibletype described in my Patent j No.`1,491,832, April V29, v1924.` A collapsible core is .shown inFigI 1. The lower end 'of the center rodl'O, by which the leaves or plates i v 12fare expanded and contracted, is provided with an enlarged lowersend 1.4 having a tubular extensionlG which#surroundsA thetenon y 18 of the lower pile section, which may be of. v

wood or concrete. ,The ,lower ends of plate .Y

'12`eXtend down around thetenon towards the .body of the pile 2O.V To ease the'driving iin.,- pact on topof 'the vtenori,"itfis customary to yprovidea cushionQ.)I between the tenon and the Vbottomjof rodV 10.

In the modification shown in Fig. 1, the upper end ofthe body 20 vof thevlower pile section isth'readed and a comparatively shortv y corrugatedsleeve 24 isscrewedonto the pile; f

The corrugated shell26 of the upper section is screwed into Asleeve appreciated vthat after lso effectively Ycouplingsleeve 24.' .Y

-1 There are dihculties in threading the body l Y condanne 24.` It'will'b'e readily i shell 26 ishlledf'with concrete, the two'sections of the pile willqbe y locked together as 'to avoidall' possibility of separation due toheavin'gfof p .Y Q0 'Y Fig shows an arrangementiinwhich the v upper shell itself is screwed dir'ectlyontol the t lower piley section without any intermediate' of actual-.practice-f Some ofV these modifica-..

tions are shown' in Figs. '2-5, inclusive. @In Fig. 2, ia= ringA 30V of concrete, w0od,fas'phalt,

k55 bodied in otherxforms withoutl departure Y iron or other materialY which will stand Vthe impact'of driving, is fitted snugly around ltenon 18.' VThe Vouter surface of. ring 30 is threaded to receive the corrugated coupling 24, andthe Lipper shell 26 isV screwed into 24 as before. Anumber oi boat spikes32'are construction as it'not only prevents separationlof the pile sections .but also prevents ein try of water VVinto the joint. It desired, the

" shell 26 lmay be screwed onto ring 30 Aand coupling V24 omitted.'

Yi ,slot 34. is fitted thecyliiidrical lower, end 36 offcoupl'ing 24. A. numberY of heavy spikes V38 are driven into the pile body fthrough In Fig. 3, a deepcircumferential,slot 34 is Y section, a lower section, amember fast to the upper end of saidlowersection, a shell surcut in the top of lower pile body 20,fand into lioles 40 in the ring 36. The upper shell 26 is threaded into coupling 24asbeiore.i Y Y In Fig.. 4 is` shown another variation, in

ywhich coupling 24 is provided with a bottom end. which'is bent'inwardly andl upwardly 'around the lower ends of plate l2 to iorm an inneriipturned ring42. A' number of spilies 44 are driven into tenon 18,]ust above ring Y 42so that they prevent ring 42 from rising.

' tively, preventing the uppersection vfrom risfing.' The tenon may be giooved as at50, if

I y' pling sleeve before the concrete ispoured.

' top of inner ring 42.. In this arrangement jThis arrangementis self-locking becausel the spikes are driven first and then the coupling ring is forced down past them, the upper edgeY of the ring-finally springing into place beneaththe heads of theV spikes. and thus effec- -desired, to accommodate the4 ring 42.

' Still another modification isshown in Fig. f 5. This is similar to Fig. 4 except that the inner upwardly extending ring 42 is not so high', yand the wspikes44 extend through the outer wall of coupling 24 as well as over the the lower ends'of blades 12 must be provided with downwardlyv opening slots or grooves 46' forfthe spikes,`in orderto permit removal of thecore after .the upper pile section has been driven. Also, the "space between theV` Y core plates, when expanded, is increased so 1 that the core. when collapsed maybe lifted out Vwithout unscrewing.

It is customary to make coupling sleeve 24 ofV considerably thicker materia-l thanthe Y ,shellitselt l It is to be'understood that the inventionis Y notfliinited to the specic construction Yherein illustrated and described but can be em Y Yfrom its spirit.l l

What I ,claimV is l. A composite pile comprising, in Ycombi- .Y

nation, a precast lowerrsection, a cast-in-place section and a shell in which said upsaid shell vbeing locked to threads'.U Y. j

'e i 'compositey pileV comprising vanr upper section enclosed by a shell, a lower section witha tenon on its upper end, a' ring tted aroundsaidtenon, means to fastensaid ringv to said tenon,and a coupling sleeve threaded i onto said ring and said shell to lock said ring and said shell together." y

3. A'y composite pile comprising-in coin- `bination,-a lower section, a coupling sleeve rounding said upper-section, and means `for. locking said shell to said memb'er,said lock-V ing means'comprising screw threads on said vmember for engagingscrew threads on saidj` shell.V i Y 5. Afcoinposite pile comprising an upper section, a lower section, a member fast to the upper end of said lower section, a shell'surf rounding said upper section, and means for locking said shell to said member, said loclr- `ing means comprising a coupling sleeve `screw threaded to said member `and to said 'shell. y

6. A composite pile comprising inycombr' nation, a lower section, a coupling sleeve secured to the top of said lower section, a shell, an upper section cast insaid shell, and means 7. yA composite pile comprising an upper section, a low-er section, a member fast to the `upper end of said lowerY section, a shell sur.-

`for positively locking said shell to saidcouv y clou" ics In testimony whereof I hereto atliX my signature.

- MAXWELL M, UPsoN.

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